27554055985 has 4 divisors (see below), whose sum is σ = 33064867188. Its totient is φ = 22043244784.

The previous prime is 27554055979. The next prime is 27554056031. The reversal of 27554055985 is 58955045572.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21416273649 + 6137782336 = 146343^2 + 78344^2 .

It is a cyclic number.

It is not a de Polignac number, because 27554055985 - 2⁷ = 27554055857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2755405594 + ... + 2755405603.

It is an arithmetic number, because the mean of its divisors is an integer number (8266216797).

Almost surely, 2^27554055985 is an apocalyptic number.

It is an amenable number.

27554055985 is a deficient number, since it is larger than the sum of its proper divisors (5510811203).

27554055985 is an equidigital number, since it uses as much as digits as its factorization.

27554055985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5510811202.

The product of its (nonzero) digits is 12600000, while the sum is 55.

The spelling of 27554055985 in words is "twenty-seven billion, five hundred fifty-four million, fifty-five thousand, nine hundred eighty-five".